﻿/***************************************************************************
**                                                                        **
**  QCustomPlot, an easy to use, modern plotting widget for Qt            **
**  Copyright (C) 2011-2015 Emanuel Eichhammer                            **
**                                                                        **
**  This program is free software: you can redistribute it and/or modify  **
**  it under the terms of the GNU General Public License as published by  **
**  the Free Software Foundation, either version 3 of the License, or     **
**  (at your option) any later version.                                   **
**                                                                        **
**  This program is distributed in the hope that it will be useful,       **
**  but WITHOUT ANY WARRANTY; without even the implied warranty of        **
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         **
**  GNU General Public License for more details.                          **
**                                                                        **
**  You should have received a copy of the GNU General Public License     **
**  along with this program.  If not, see http://www.gnu.org/licenses/.   **
**                                                                        **
****************************************************************************
**           Author: Emanuel Eichhammer                                   **
**  Website/Contact: http://www.qcustomplot.com/                          **
**             Date: 25.04.15                                             **
**          Version: 1.3.1                                                **
****************************************************************************/

#include "qcpdocumentobject.h"

QCPDocumentObject::QCPDocumentObject(QObject* parent) :
    QObject(parent)
{
}

QSizeF QCPDocumentObject::intrinsicSize(QTextDocument* doc, int posInDocument, const QTextFormat& format)
{
    Q_UNUSED(doc)
    Q_UNUSED(posInDocument)
    QPicture pic = qvariant_cast<QPicture>(format.property(PicturePropertyId));

    if (pic.isNull())
    {
        qDebug() << Q_FUNC_INFO << "Plot object is empty";
        return QSizeF(10, 10);
    }
    else
        return QSizeF(pic.boundingRect().size());
}

void QCPDocumentObject::drawObject(QPainter* painter, const QRectF& rect, QTextDocument* doc, int posInDocument,
                                   const QTextFormat& format)
{
    Q_UNUSED(doc)
    Q_UNUSED(posInDocument)
    QPicture pic = qvariant_cast<QPicture>(format.property(PicturePropertyId));

    if (pic.isNull())
        return;

    QSize finalSize = pic.boundingRect().size();
    finalSize.scale(rect.size().toSize(), Qt::KeepAspectRatio);
    double scaleFactor = finalSize.width() / (double)pic.boundingRect().size().width();
    painter->save();
    painter->scale(scaleFactor, scaleFactor);
    painter->setClipRect(rect);
    painter->drawPicture(rect.topLeft(), pic);
    painter->restore();
}

QTextCharFormat QCPDocumentObject::generatePlotFormat(QCustomPlot* plot, int width, int height)
{
    QPicture picture;
    QCPPainter qcpPainter;
    qcpPainter.begin(&picture);
    plot->toPainter(&qcpPainter, width, height);
    qcpPainter.end();

    QTextCharFormat result;
    result.setObjectType(QCPDocumentObject::PlotTextFormat);
    result.setProperty(QCPDocumentObject::PicturePropertyId, QVariant::fromValue(picture));
    return result;
}
